MSM 4 - Sound Level Meter PCE Instruments - Free user manual and instructions
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| Product Type | Sound Level Meter |
| Brand | PCE Instruments |
| Model | MSM 4 |
| Measurement Range | 30 to 130 dB |
| Accuracy | ±1.5 dB (at 94 dB, 1 kHz) |
| Frequency Weighting | A and C |
| Time Weighting | Fast (125 ms) and Slow (1 s) |
| Resolution | 0.1 dB |
| Display | Digital LCD with backlight |
| Data Hold | Yes |
| MAX/MIN Function | Yes |
| Microphone | Electret condenser microphone |
| Power Supply | 9V battery (6F22 or equivalent) |
| Battery Life | Approx. 50 hours |
| Auto Power Off | Yes (after 15 minutes of inactivity) |
| Dimensions | 250 x 70 x 30 mm |
| Weight | 200 g (including battery) |
| Operating Temperature | 0°C to 40°C |
| Operating Humidity | <80% RH |
| Storage Temperature | -10°C to 50°C |
| Standards | IEC 61672-1 Class 2 |
| Maintenance | Clean with a soft, dry cloth; remove battery if not used for long periods |
| Safety Precautions | Do not use in explosive atmospheres; protect from moisture and dust |
| Spare Parts / Repairability | Replacement microphone, windscreen, and battery available; service by qualified personnel |
Frequently Asked Questions - MSM 4 PCE Instruments
How to turn on the PCE Instruments MSM 4?
Press the POWER button on the front panel. The display will light up. To turn off, press and hold the same button for 2 seconds.
How to select frequency weighting A or C?
Press the WEIGHTING button to toggle between A and C weighting. The current setting is shown on the display.
What is the difference between Fast and Slow time weighting?
Fast (125 ms) captures rapid sound level changes, while Slow (1 s) provides a smoother reading for steady noise.
How to use the MAX/MIN function?
Press the MAX/MIN button to cycle through maximum, minimum, and current readings. The display will show the corresponding value.
What battery does the MSM 4 use and how to replace it?
It uses a standard 9V battery (6F22). Slide the battery compartment cover downward, disconnect the old battery, connect a new one, and close the cover.
How to calibrate the sound level meter?
For accurate measurements, use an external calibrator (e.g., PCE-CAL). Insert the meter's microphone into the calibrator cavity and adjust the trimmer if needed. Refer to the service manual.
Why does the meter turn off automatically?
The Auto Power Off feature saves battery. It shuts down after 15 minutes of no button activity. Press the POWER button to restart. To disable, press and hold the DATA HOLD button while turning on.
Can I measure noise above 130 dB?
No, the maximum measurement range is 130 dB. Exceeding this may damage the microphone. Use a higher-range meter for intense noise.
How to clean and maintain the device?
Wipe the exterior with a soft, dry cloth. Do not use solvents. Store in a dry place. If not used for a month, remove the battery to prevent leakage.
Where can I find replacement parts for the MSM 4?
Contact PCE Instruments or authorized dealers for spare parts like the microphone, windscreen, and battery. The device is repairable by certified technicians.
User questions about MSM 4 PCE Instruments
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USER MANUAL MSM 4 PCE Instruments
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Product information
Brand : PCE Instruments
Model : MSM 4
Category : Sound Level Meter